Parameters accessible with Function Code 03, 06,10h
Time
56 HC900 Process Controller Communications User Guide Revision 13
April 2017
Example
Query: Read Variables 1 and 2 from HC900 at address 1 using Function Code 3 (hex codes).
TCP:
RTU:
Response: from HC900 where Variable 1 = 100.0 and Variable 2 = 55.32
TCP:
RTU:
6.7 Time
The addresses given in Table 6-6 do not necessarily apply to time parameters in the custom map. For
custom addresses view or print a report in HC Designer.
In HC Designer’s custom map these parameters are grouped under the Item Filter “System Parameters.”
You must add them all to the custom map in order to write to them. See Attention below.
Table 6-6 Time parameters
The values read are always in the range
of 1970 to 2037 for a write. 0 – 37
represents 2000 – 2037, 70 – 99
represents 1970 – 1999
Time registers must all be written in a single transaction. Writing to Week Day is optional.
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